#region License
// Copyright (c) 2007, James Newton-King
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//     * Redistributions of source code must retain the above copyright
//       notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above copyright
//       notice, this list of conditions and the following disclaimer in the
//       documentation and/or other materials provided with the distribution.
//     * Neither the name of the Newtonsoft nor the
//       names of its contributors may be used to endorse or promote products
//       derived from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL <copyright holder> BE LIABLE FOR ANY
// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#endregion

using System;
using System.Collections.ObjectModel;
using System.ServiceModel;
using System.ServiceModel.Channels;
using System.ServiceModel.Description;
using System.ServiceModel.Dispatcher;

namespace Newtonsoft.Utilities.Services
{
  public class ErrorBehaviorAttribute : Attribute, IServiceBehavior
  {
    private readonly Type _errorHandlerType;

    public ErrorBehaviorAttribute(Type errorHandlerType)
    {
      _errorHandlerType = errorHandlerType;
    }

    void IServiceBehavior.Validate(ServiceDescription description, ServiceHostBase serviceHostBase)
    {
    }

    void IServiceBehavior.AddBindingParameters(ServiceDescription description, ServiceHostBase serviceHostBase, Collection<ServiceEndpoint> endpoints, BindingParameterCollection parameters)
    {
    }

    void IServiceBehavior.ApplyDispatchBehavior(ServiceDescription description, ServiceHostBase serviceHostBase)
    {
      IErrorHandler errorHandler = CreateErrorHandler();

      foreach (ChannelDispatcherBase channelDispatcherBase in serviceHostBase.ChannelDispatchers)
      {
        ChannelDispatcher channelDispatcher = (ChannelDispatcher)channelDispatcherBase;
        channelDispatcher.ErrorHandlers.Add(errorHandler);
      }
    }

    protected virtual IErrorHandler CreateErrorHandler()
    {
      try
      {
        return (IErrorHandler)Activator.CreateInstance(_errorHandlerType);
      }
      catch (MissingMethodException e)
      {
        throw new ArgumentException("The errorHandlerType specified in the ErrorBehaviorAttribute constructor must have a public empty constructor.", e);
      }
      catch (InvalidCastException e)
      {
        throw new ArgumentException("The errorHandlerType specified in the ErrorBehaviorAttribute constructor must implement System.ServiceModel.Dispatcher.IErrorHandler.", e);
      }
    }
  }
}